What is wave optics? Web optics is based on wave theory of light put forward by Huyghen. According to wave theory, light is a form of energy which travels through a medium in the form of transverse wave . Wave optics A wave front It is defined as the locus of all the particle of a medium, which are vibrating in the same phase. When source of light is a point source, the wave front is spherical. When source is linear, the wave front is cylindrical. At very large distance from the source, a portion of spherical or cylindrical wave front appears to be plane. A wave front travels parallel to itself and perpendicular to the rays. Huyghen's principle Huyghen's principle of geometrical contraction of a wave front at any instant says: 1) Every point on given wave front (called primary wave front) acts as a fresh source of new disturbance, called secondary wavelets. 2) The secondary wavelets travel in all the directions with the speed of light in the medium. ...
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